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An unknown foul smelling hydrocarbon gives the mass spectrum and infrared spectrum with a major fragment at 39, 67, 81, and 95. propose structures for the major fragments
Hydrogenation of the unknown gives n-octane
Use IR spectrum to to determine functional group(s)
Use the mass spectrum to propose a molecular formula
How many elements of unsaturation are there
Dissolving NH4Cl(s) in water is endothermic with a heat of the solution of 15.2 kJ/mol. If a 6.134 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum temperature reached by the solution
atomic radius for Copper ,and assuming the atoms to be rigid spheres,
the percentage yield of nh3 from the following reaction is 85? what actual yield is expected from the reaction of
Structure of a compound containing a leaving group that is more hindered than the leaving group in t-butyl bromide
Use the standard enthalpies of formation given below to calculate the enthalpy change for following reaction at 298.15 K and 1 atm. Label each as endothermic or exothermic.
a crystal consists of a building block an atom or group of atoms that is repeated periodically through space.a describe
Sodium bicarbonate decomposes to form the final solid product sodium oxide. Using a balanced equation, you are to convert the grams of sodium bicarbonate, one number is 5.213, to moles.
A 97.0 mL sample of 0.0200 M HCl is titrated with 0.0400 M RbOH solution. Calculate the pH after the following volumes of base have been added. (a) 22.3 mL pH = (b) 47.5 mL pH = (c) 48.5 mL pH = (d) 49.5 mL pH = (e) 94.1 mL pH =
An element has 3 stable isotopes with natural abundances of 11%, 17%, and 72%. The masses of those isotopes are 19.9, 21.9, and 22.9 amu respectively. What is the average atomic mass of this element?
What is the concentration of iron in the steel sample? Express your answer as grams of Fe per grams of steel (g Fe2 / g steel).
How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter
Predict the change in energy (J/photon) that occurs when an electron moves from n = 2 to n = 1.
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